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Asked: 2026-05-10T21:37:53+00:00

I need an algorithm to determine if a sentence, paragraph or article is negative

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I need an algorithm to determine if a sentence, paragraph or article is negative or positive in tone… or better yet, how negative or positive.

For instance:

Jason is the worst SO user I have ever witnessed (-10)

Jason is an SO user (0)

Jason is the best SO user I have ever seen (+10)

Jason is the best at sucking with SO (-10)

While, okay at SO, Jason is the worst at doing bad (+10)

Not easy, huh? 🙂

I don’t expect somebody to explain this algorithm to me, but I assume there is already much work on something like this in academia somewhere. If you can point me to some articles or research, I would love it.

Thanks.

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1 Answer

  1. There is a sub-field of natural language processing called sentiment analysis that deals specifically with this problem domain. There is a fair amount of commercial work done in the area because consumer products are so heavily reviewed in online user forums (ugc or user-generated-content). There is also a prototype platform for text analytics called GATE from the university of sheffield, and a python project called nltk. Both are considered flexible, but not very high performance. One or the other might be good for working out your own ideas.

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